What was found
WHILE AIRCRAFT WAS IN HEAVY CHECK MAINTENANCE FOUND THE FORWARD RIGHT SILL PLATE AT DOOR R1 CORRODED. MAINTENANCE REMOVED AND REPLACED THE FORWARD RIGHT SILL PLATE AT DOOR R1 IAW EMB 190 SRM 51-40-02, 51-43-02, 51-41-02, AND 51-43-02. THE AIRCRAFT IS OUT OF SERVICE IN HEAVY CHECK.